Wire-cable clamp.



No. 838,500. PATENTBD DBG. 11, 1906.- J. H. 000K. WIRE GABLE CLAMP. IIIIIIIIIIIIIIIII 011.21. 1901.

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Fiyi V F192 w21/lesse@ j da /w'f'nfar No. 838,500. PATENTED DEC. l1, 1906.

(J. H. COOK.

WIRE CABLE CLAMP.

APPmoATIoN HLED 00mn. 1901- z SHEETS-SHEET 2.

Wwf/essexby Z? mfww/w JOHN H. COOK, OF NEW YORK,- N. Y.,

ASSIGNOR TO HENRY B. NEWHALL,

OF PLAINFIELD, NEW JERSEY.

WIRE-'CABLE CLAMP.

Specification of Letters Patent.

Patented Dec. 11, 1906.

Application filed October 21, 1901. Serial No. 79,352.

To @ZZ whom it may concern.'

Be it known that I, JOHN H. COOK, a citi- Zen of the United States, and a resident of New York, in the county of Kings and State of New York, have invented a new and useful Improvement in /Vire-Cable Clamps, of which the following is a specification, taken in connection with the accompanying drawings, annexed to and forming a part of the same.

This invention relates to wire-cable clamps adapted to secure the ends of a cable of woven or twisted wire by securing the cable in the grooves in the clamp.

ln the accompanying drawings, in which the same reference character refers to similar parts in the various igures, Figure 1 is a longitudinal section of one form of my invention, taken through one of the grooves. Fig. 2 is an end view of the same. Fig. 3 is a detail sectional view on line 3 3 of Fig. 1. Fig. 4 is also a detail sectional view showing the form of grooves. Fig. 5 is a longitudinal sectional view of a modified form of clamp, taken through one of the grooves. Fig. 6 is an end view of the same. Fig. 7 is a central section on line 7 7 of Fig. 5.

The clamp is formed of a back and cover in which grooves are formed to more effectually grip a cable engaging these grooves. The cover and back are secured together by bolts, which are permanently secured to the back, preferably by casting them into the same, and these bolts are engaged by suitable nuts, which secure the back and cover together and grip the cable to which the clamp is a plied with any desired degree of force.

T e clamp is composed of the back A2, preferably formed of cast-iron, although any other desired material may be used, and a number of bolts B are rigidly secured to the back, preferably by casting them into the same, the heads of the bolts B1 being firmly embedded in the material of the back which is cast about them, so that the bolts are rigidly and permanently secured in proper position. If desired, the bolts may be permanently secured to the back in any other desired way, so that the back and bolts form one integral structure. The cover A1 is formed, referably, of cast material and is ormed with three holes A5 (see Fig. 2,) which are provided at their inner ends with the countersunk enlargements A10, so that the cover is more readily put in place upon the bolts B, which are of course inserted through the holes A9 in fitting the. two parts of the clamp together. The grooves A3 and A4 extend longitudinally of the clamp on either side of the center of the same, and these grooves are in both the back and cover.

The grooves are of circular cross-section and extend varying distances into the cover and back at various points along the length of the same, as is indicated in Fig. 1. Fig. 3, which is a cross-section on the line 3 3 of Fig. 1, indicates that at the central portion of the clamp the groove extends equally into both the cover and back-that is, both the cover and back at this point are provided with a groove of semicircular cross-section. At the end of the clamp, however, the grooves are formed principa ly in the back, as indicated by Fig. 4, a section near the end of the clamp. The ygroove in the cover is seen to be very shallow at this point. This curved form of the grooves throughout the length of the clamp is to give the clamp a better grip upon the cable, which it engages, since the cable is wedged into the deeper parts of the grooves and is thereby gripped more securely. As is seen in Fig. 4, the deeper groove in the back is not exactly of circular contour, since the portions A5 are relieved in order that they may be more readily formed by casting. These grooves are provided throughout their length with gripping projections A6, formed, ,as indicated in Fig. 3, at angles of ninety degrees around the grooves. These projections, which are preferably of pyramidal or diamond contour, although they may be formed of any other desired contour, are spaced throughout the length of the groove, as indicated in Fig. 1. Projections of this form have been found to engage a wire cable very effectively and to grip the same irmly.

It will be noted that in the form of clamp shown in Figs. 1 to 4 the grooves on either side of the clamp are symmetrical, the groove on one side of the clamp being exactly like the groove on the other side, so that with this forni of clamp the position of the back may be reversed so long as the grooved sides of the back and cover are brought together. There is no possibility of the cover being put on wrongly in assembling the clamp, since the grooves are symmetrical with respect to the center of the clamp.

If desired, however, v

IOO

the grooves need not be formed symmetrically, and for some purposes it is preferable to forni the grooves in the back and cover, as indicated in Figs. 5 to 7. In that case the grooves are both of varying depth at different points along the length of the clamp; but

the two grooves A, and A8 are not sym-- metrical about the center of the clamp, the groove A8 curving upward, so that it has a greater depth at its central part in the cover All, while the groove A., at this point has a greater depth in the back A12. It will be apparent, therefore, that with this unsymmetrical arrangement of grooves it is necessary that the clamp be assembled in the proper way and that it would be impossible to turn the cover through an angle of one hundred and eighty degrees, since in that case the two deep grooves would come together at the center and the two shallow grooves would come together, so that the clamp would not properly grip a cable inserted in it. In order to prevent the possibility of wrongly assembling the clamp, the bolts B3, B4, and B5, which are permanently secured in the back, as has been stated, are unequally spaced in the back. The central bolt B4, as seen in Fig. 5, is considerably nearer to the bolt B3 than it is to the other bolt B5. The holes A9, cast in the cover, are correspondingly spaced, so that it is only possible to assemble this clamp in the way in which the grooves come into proper coaction. The gripping projections -are similarly'formed in this clamp. Instead of spacing the clamping-bolts un- .equally it is possible to prevent the improper assembling of the clamp in other ways-for instance, by forming suitable proj ections in the back to engage depressions in tl...- cover, or this might be accomplished in other ways.

Many modifications may be made in this device by those skilled in this art without departing from the spirit of this invention, and it is possible to use parts of this invention without employing the whole of the same. I do not, therefore, wish to be limited by the disclosure which I have made in this case but What I wish to secure by Letters Patent is set forth in the appended claims:

1. In a clamp, a back, three clampingbolts permanently secured to said back arranged longitudinally along the center of the same, the central clamping-bolt being unequally spaced with respect to the other bolts, a cover to iit upon said back, said cover being provided with a centrallyarranged series of holes to receive said bolts, the spacing of said bolts and holes being arranged to secure the proper positioning of said back and said cover, said back being formed with longitudinal grooves on both sides of said bolts, said grooves being of varying depth at various points along the length of the same, said grooves being substantially semicircular in cross-section at the ends of said back and one of said grooves being curved so as to be deeper at the central portion of said back than at the ends and the other of said grooves being curved so as to be shallower at the central portion of said back than at the ends of the same, said cover being formed with longitudinal grooves on both sides of said holes, said grooves being curved to coact with the grooves in said back to form curved grooves of substantially circular crosssection.

2. In a clamp, a back, a series of clampingbolts permanently secured to said back, said clamping-bolts being unequally spaced, a cover to fit upon said back, said cover being provided with a series of unequally-spaced holes to receive said bolts to secure the proper positioning of said cover upon said back, there being longitudinal grooves formed in said back and said cover on both sides of the same of varying depth at various points along the length of said grooves, the grooves in said back being curved so as to be of unequal depth at the center of the same, the grooves in said cover being curvedto coperate with the grooves in said back to form curved grooves of substantially circular cross-section.

3. In a clamp, back and cover members having grooves of varying depth in their coacting faces to form a plurality of curved grooves unsymmetrical about the centers of said members and means including a series of bolts to prevent the improper assembling of'said members and to secure said members together.

4. In a clamp, back and cover members formed with grooves of varying depth in their coacting faces to constitute a plurality of curved longitudinal grooves, the grooves in each member being of unequal depth at the center of the same and means to prevent the improper assembling of said members and to secure the proper alinement of said grooved faces.

5. In a clamp, a back, a series of clampingbolts unequally spaced in said back, a cover toiit upon said back, said cover being provided with a series of unequally-spaced holes IOC to receive said bolts to secure the proper longitudinal series of clamping-bolts per- 1 stantially circuler cross-section and a. series of pyramldal prol1eet1ons formed on said back 1 o and cover to project into said grooves.

JOHN H. COOK.

Witnesses:

HARRY L. DUNCAN, JOHN N. MOORE. 

